linux-kernel - Re: [PATCH 1/2] arm: plat-orion: Add coherency attribute when setup mbus target

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Message-ID: <20121024135556.157d2e59@skate>
Date:	Wed, 24 Oct 2012 13:55:56 +0200
From:	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
To:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
Cc:	Jason Cooper <jason@...edaemon.net>, Andrew Lunn <andrew@...n.ch>,
	linux-arm-kernel@...ts.infradead.org,
	Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
	Russell King <linux@....linux.org.uk>,
	Rob Herring <rob.herring@...xeda.com>,
	Ben Dooks <ben-linux@...ff.org>,
	Ian Molton <ian.molton@...ethink.co.uk>,
	Nicolas Pitre <nico@...xnic.net>,
	Lior Amsalem <alior@...vell.com>,
	Maen Suleiman <maen@...vell.com>,
	Tawfik Bayouk <tawfik@...vell.com>,
	Shadi Ammouri <shadi@...vell.com>,
	Eran Ben-Avi <benavi@...vell.com>,
	Yehuda Yitschak <yehuday@...vell.com>,
	Nadav Haklai <nadavh@...vell.com>,
	Ike Pan <ike.pan@...onical.com>,
	Jani Monoses <jani.monoses@...onical.com>,
	Chris Van Hoof <vanhoof@...onical.com>,
	Dan Frazier <dann.frazier@...onical.com>,
	Leif Lindholm <leif.lindholm@....com>,
	Jon Masters <jcm@...hat.com>,
	David Marlin <dmarlin@...hat.com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] arm: plat-orion: Add coherency attribute when setup
 mbus target


On Wed, 24 Oct 2012 10:04:00 +0200, Gregory CLEMENT wrote:
> Recent SoC such as Armada 370/XP came with the possibility to deal
> with the I/O coherency by hardware. In this case the transaction
> attribute of the window must be flagged as "Shared transaction". Once
> this flag is set, then the transactions will be forced to be sent
> through the coherency block, in other case transaction is driven
> directly to DRAM.
> 
> Signed-off-by: Gregory CLEMENT <gregory.clement@...e-electrons.com>
> Reviewed-by: Yehuda Yitschak <yehuday@...vell.com>

Acked-by: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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